Steps to replicate the issue (include links if applicable):

• Go to https://en.wikipedia.org/wiki/Special:Watchlist
• Try any of the following actions:

What happens?:

1. Thank link/button does not react on Space while being essentially a button
2. Does not have role=button while acting as one
3. The page loses focus upon pressing the thank button (focus should be kept to the confirmation interface)
4. Yes/no buttons also do not react on Space and do not have proper semantics (role=button)
5. Debatable: you should be able to cancel the prompt with Esc button

Same applies to rollback confirmation and any modules based on jquery.confirmable.